//
// ========================================================================
// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.spdy.parser;
import java.nio.ByteBuffer;
import org.eclipse.jetty.spdy.frames.PingFrame;
public class PingBodyParser extends ControlFrameBodyParser
{
private final ControlFrameParser controlFrameParser;
private State state = State.PING_ID;
private int cursor;
private int pingId;
public PingBodyParser(ControlFrameParser controlFrameParser)
{
this.controlFrameParser = controlFrameParser;
}
@Override
public boolean parse(ByteBuffer buffer)
{
while (buffer.hasRemaining())
{
switch (state)
{
case PING_ID:
{
if (buffer.remaining() >= 4)
{
pingId = buffer.getInt() & 0x7F_FF_FF_FF;
onPing();
return true;
}
else
{
state = State.PING_ID_BYTES;
cursor = 4;
}
break;
}
case PING_ID_BYTES:
{
byte currByte = buffer.get();
--cursor;
pingId += (currByte & 0xFF) << 8 * cursor;
if (cursor == 0)
{
onPing();
return true;
}
break;
}
default:
{
throw new IllegalStateException();
}
}
}
return false;
}
private void onPing()
{
PingFrame frame = new PingFrame(controlFrameParser.getVersion(), pingId);
controlFrameParser.onControlFrame(frame);
reset();
}
private void reset()
{
state = State.PING_ID;
cursor = 0;
pingId = 0;
}
private enum State
{
PING_ID, PING_ID_BYTES
}
}